Right-Sizing Your EBS Volumes: Optimizing Storage Without Downtime
Zivan Ori
September 4, 2024 | 3 min read
As your AWS infrastructure grows, right-sizing your EBS volumes becomes crucial for both performance and cost efficiency. But what happens when your EBS volume is running out of space, or conversely, when it’s underutilized? Proper right-sizing is key to ensuring your storage remains optimized.
This blog delves into the importance of understanding capacity utilization, the challenges of resizing volumes, and the strategies needed to maintain a cost-effective and high-performing cloud environment.
Understanding Capacity Utilization
EBS doesn’t directly report on your capacity utilization, which can make it challenging to know when you’re nearing capacity limits. The first indication often comes from your EC2 instance’s file system. You can monitor this by running a simple Linux command
(df -h) or using tools like CloudWatch Agent to track disk usage (disk_used_percent). Other monitoring solutions like Datadog or Prometheus can also provide valuable insights.
Increasing EBS Volume Size
If you find that your EBS volume is running out of space, AWS provides a straightforward solution. Using the ModifyVolume command, you can increase your EBS volume size without any downtime or performance penalties. This command also allows you to change the volume type, adjust IOPS, and modify bandwidth reservations. After increasing the volume size, you’ll need to resize your file system to utilize the additional space. This can be done without downtime using the resize2fs command for ext4 or xfs_growfs for XFS file systems.
Take the next step in EBS optimization. Reach out today to take control of your storage strategy.
The Challenge of Shrinking EBS Volumes
While increasing the size of an EBS volume is relatively simple, shrinking a volume is not supported. If your file system is underutilized and you want to reduce your EBS volume size, the process is more complex. It typically involves taking downtime, creating a new, smaller volume, and manually copying files over—a time-consuming and sometimes impractical solution, especially for critical systems.
Right-sizing your EBS volumes without any downtime is where Datafy offers a unique advantage. Our solution automates the scaling of your EBS volumes’ capacity based on actual usage, seamlessly increasing or decreasing volume size as needed. This process happens without any downtime and requires no manual intervention at the application or file system level.
The Strategic Impact of Right-Sizing—Enhancing Efficiency and Reducing Waste
Right-sizing your EBS volumes isn’t just about fine-tuning capacity—it’s about making strategic decisions that drive both operational excellence and cost-effectiveness. For DevOps teams, regular performance assessments ensure that volumes are neither underutilized nor strained, preventing performance bottlenecks. Tools like AWS Cost Explorer can help monitor IOPS and throughput, optimizing application performance in real-time.
For FinOps teams, a proactive approach is essential. This includes auditing storage use, decommissioning idle volumes, and right-sizing snapshots to avoid hidden costs. The outcome? A leaner, more efficient infrastructure that maximizes the return on your AWS investment.
By embedding these best practices into your right-sizing strategy, you ensure that every aspect of your cloud infrastructure is optimized, minimizing waste and maximizing value.
Curious about how you can streamline your Cloud operations? Request a personalized demo to see how Datafy can help you optimize your storage and reduce costs.
Recent Posts
Yoav Ilovich, Co-Founder and CPO
August 24, 2025 | 5 min read
Datafy Team
February 12, 2025 | 2 min read
Yoav Ilovich, Co-Founder and CPO
June 18, 2024 | 5 min read